.share-poster-overlay {
  --poster-surface: #fff;
  --poster-preview: #f7f7f8;
  --poster-text: #171717;
  --poster-muted: #737373;
  --poster-line: #ebebed;
  --poster-hover: #f0f0f2;
  --poster-disabled: #ededee;
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  color: var(--poster-text);
  font-family: Inter, "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", sans-serif;
}
.dark .share-poster-overlay {
  --poster-surface: #202022;
  --poster-preview: #18181a;
  --poster-text: #f5f5f5;
  --poster-muted: #a3a3a3;
  --poster-line: #303034;
  --poster-hover: #303034;
  --poster-disabled: #303034;
}
.share-poster-overlay, .share-poster-overlay * { box-sizing: border-box; }
.share-poster-backdrop { position: absolute; inset: 0; background: rgb(0 0 0 / .32); backdrop-filter: blur(6px); }
.share-poster-dialog {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 440px;
  max-height: 100%;
  overflow: hidden;
  border: 1px solid var(--poster-line);
  border-radius: 16px;
  background: var(--poster-surface);
  box-shadow: 0 16px 56px rgb(0 0 0 / .14);
  outline: none;
}
.share-poster-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-shrink: 0; padding: 16px 20px; border-bottom: 1px solid var(--poster-line); }
.share-poster-title { margin: 0; color: var(--poster-text); font-size: 17px; font-weight: 600; line-height: 1.4; letter-spacing: -.02em; }
.share-poster-close { display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; width: 32px; height: 32px; padding: 7px; border: 0; border-radius: 8px; background: transparent; color: var(--poster-muted); cursor: pointer; transition: background .15s, color .15s; }
.share-poster-close:hover { background: var(--poster-hover); color: var(--poster-text); }
.share-poster-close svg { width: 18px; height: 18px; }
.share-poster-body { display: flex; align-items: center; justify-content: center; min-height: min(260px, 40dvh); padding: 24px; overflow-y: auto; overscroll-behavior: contain; background: var(--poster-preview); }
.share-poster-status { display: flex; flex-direction: column; align-items: center; gap: 14px; width: 100%; padding: 28px 0; text-align: center; }
.share-poster-status p { margin: 0; color: var(--poster-muted); font-size: 13px; line-height: 1.7; overflow-wrap: anywhere; }
.share-poster-spinner { width: 26px; height: 26px; border: 2px solid var(--poster-line); border-top-color: var(--poster-text); border-radius: 50%; animation: share-poster-spin .8s linear infinite; }
.share-poster-error { gap: 10px; }
.share-poster-error > svg { width: 28px; height: 28px; margin-bottom: 4px; color: var(--poster-muted); }
.share-poster-error h3 { margin: 0; color: var(--poster-text); font-size: 15px; font-weight: 600; line-height: 1.5; }
.share-poster-preview { display: flex; flex-direction: column; align-items: center; width: 100%; margin: 0; }
.share-poster-preview img { display: block; width: auto; height: auto; max-width: 100%; max-height: calc(100dvh - 240px); object-fit: contain; box-shadow: 0 3px 16px rgb(0 0 0 / .08); }
.share-poster-preview figcaption { display: none; margin-top: 16px; color: var(--poster-muted); font-size: 12px; line-height: 1.6; text-align: center; }
.share-poster-footer { display: flex; flex-shrink: 0; gap: 10px; padding: 16px 20px 20px; border-top: 1px solid var(--poster-line); }
.share-poster-button { display: inline-flex; flex: 1; align-items: center; justify-content: center; gap: 8px; min-width: 0; min-height: 44px; padding: 10px 16px; border: 1px solid transparent; border-radius: 10px; background: var(--poster-text); color: var(--poster-surface); font-family: inherit; font-size: 14px; font-weight: 600; line-height: 1.5; cursor: pointer; transition: opacity .15s, background .15s; }
.share-poster-button svg { width: 18px; height: 18px; flex-shrink: 0; }
.share-poster-button:hover:not(:disabled) { opacity: .85; }
.share-poster-button:disabled { background: var(--poster-disabled); color: var(--poster-muted); cursor: default; }
.share-poster-button-secondary { background: var(--poster-surface); border-color: var(--poster-line); color: var(--poster-text); }
.share-poster-button-secondary:hover { background: var(--poster-hover); }
.share-poster-button:focus-visible, .share-poster-close:focus-visible { outline: 2px solid var(--poster-text); outline-offset: 3px; }
.share-poster-dialog-enter-active, .share-poster-dialog-leave-active { transition: opacity .18s; }
.share-poster-dialog-enter-active .share-poster-dialog, .share-poster-dialog-leave-active .share-poster-dialog { transition: transform .18s; }
.share-poster-dialog-enter-from, .share-poster-dialog-leave-to { opacity: 0; }
.share-poster-dialog-enter-from .share-poster-dialog, .share-poster-dialog-leave-to .share-poster-dialog { transform: translateY(8px); }
@keyframes share-poster-spin { to { transform: rotate(360deg); } }
@media (max-width: 767px) {
  .share-poster-header { padding: 12px 16px; }
  .share-poster-close { width: 40px; height: 40px; }
  .share-poster-body { padding: 20px; }
  .share-poster-footer { padding: 14px 16px 16px; }
  .share-poster-preview figcaption { display: block; }
  .share-poster-preview img { max-height: calc(100dvh - 280px); }
}
@media (prefers-reduced-motion: reduce) {
  .share-poster-dialog-enter-active, .share-poster-dialog-leave-active,
  .share-poster-dialog-enter-active .share-poster-dialog, .share-poster-dialog-leave-active .share-poster-dialog { transition: none; }
  .share-poster-spinner { animation-duration: 1.8s; }
}